Definition of bagworm
: any of a family (Psychidae) of moths with wingless females and plant-feeding larvae that live in a silk case covered with plant debris; especially : one (Thyridopteryx ephemeraeformis) often destructive to deciduous and evergreen trees of the eastern U.S.
Recent Examples of bagworm from the Web
Subject to spider mites and occasionally bagworms, but both are easily stopped.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bagworm.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of bagworm
Learn More about bagworm
Seen and Heard
What made you want to look up bagworm? Please tell us where you read or heard it (including the quote, if possible).